Originally Posted by
Blue22
Who didn't suspect Roundhouse? We all knew it wasn't Damian or Wallace, and Glass worked so hard to make the three girls look suspicious, while keeping Billy's origin as vague as possible, that it literally couldn't have been anyone but him. This wasn't Heroes in Crisis levels of a bad mystery but it really was simple. It was always either gonna be Roundhouse or none of them.
So let's hope he actually subverts expectations this time and doesn't have everyone jump on the "You saved us this one time so we forgive you" bandwagon with Billy.
As for the other, I honestly don't even care who he is. The most likely candidate is yet another person from Damian's past to keep reminding us what a bad person he used to be. Either that or someone we haven't seen before, who has no connection to anyone. Making the mystery of his identity all the more contrived.